Tubular boiler



Patented Dec. 6, I898.

N0. 6l5,66l.

J. J. CAIN.

TUBULAR BOILER.

(Application filed Feb. 25, 1898.) (No Model.) 2 Sheets'$heet I.

IN VE N TOR d T TOHNEY NIT-ED STATES PATENT OFFICE.

JOHN J. CAIN, or BAYONNE, NEW JERSEY.

TUB U LAR BOILER.

SPECIFICATION forming part of Letters Patent No. 615,661, dated December 6, 1898.

Application filed February 25, 1898- Serial No 1 7 (N0 model-3 both steam and water drums.

My improved form of drum is designed to provide ample steam-space and water-holding capacity for the class of boilers it is intended to be applied to and to make the same of less height than that of such boilers as heretofore made with drums applied at their upper parts and having the same steam-making and water-holding capacities, thus adapting tubular boilers for use in places where head-room is restricted, and particularly for use in boats, as the strength and steaming efficiency of such boilers make them for this purpose especially advantageous. the drums larger at one end than at the other or conical in form and apply them to boilers in which the tubes are placed in incline position, the drum or drums being arranged in the same general direction as the tubes, with the large end or ends over the lower ends of the tubes and the small end or ends over the higher ends of the tubes, the upper sides of the drum or drums being arranged substantially horizontal. The lower side of the larger end of the drum or lower sides of the larger ends of the drums I connect with the downtake or downtakes of the boiler, which is or are in communication with the lower ends of the tubes, and the lower side or sides of the small end or ends of the drum or drums I connect with the uptake or uptakes of the boiler, which is or are in communication with the upper ends of the tubes. By this arrangement the tubes will always be supplied with water, as the main volume (the greatest depth) of water in the drum or drums is over the downtake or downtakes, and the steam from the tubes will meet with the least resistance in passing to the steam space or spaces of the drum or drums from the uptake To accomplish this, I makev or uptakes, as it is there opposed by the lesser volume (the least depth) of the water in the drum or drums. \Vhen two or more drums of this character are used on one boiler, they will be connected together by tubes, which will be preferably made of such a length that they may be set in position by being passed from the interior of one of the drums. This provision requires that thedistance between the adjacent sides of the drums where any of the connecting-tubes are located shall not be greater than the diameter of the drums at such location. These with other improvements, such as new features of construction of headers, will be fully described by reference to the accompanying drawings, which show my present invention applied to a boiler having the general characteristics of the sectional boiler patented to me June 2, 1896, and numbered 561,257.

Figure 1 is a front elevation of a sectional tubular boiler embodying my present invention. Fig. 2 is a longitudinal section taken on the line 2 2, Fig. 1; and Fig. 3 is a plan view of the same.

The main part of the boiler to which my present improvements are shown applied comprises two vertical boxes or water-legs a a at the front end and two vertical boxes or water-legs a a at the rear end, horizontallyarranged rectangular headers 17 I), located between and connected by nipples to the two front Vertical boxes at a, and similar headers arranged between and connected by nipples to the two rear vertical boxes a a, side boxes or pipes c 0, connecting the front and rear headers together, and series of tubes (1 d, an-' gularly longitudinally arranged and connected to the front and rear headers and expanded in holes formed in the headers in the usual 'manner,'the said headers being set in angular position, so that the inner face of each front header is opposite and parallel to the inner face of the rear header, to which it is connected by the inclined tubes.

The gratee rests on supports 6 e, the firing end of it being here shown at the end of the boiler at which the lower ends of the inclined tubes cl d are located. The front vertical boxes (I a are at their lower ends connected together by the box or tube f, which is arranged just below the furnace feed-opening.

The lower parts of the rear vertical boxes are connected by the boxes or tubes f f at the rear of thefurnace, the furnace back wall g being placed just in front of these boxes.

So far as described this boiler is similar to the one covered by the before-mentioned patent. The rectangular headers here shown embody novel features of construction, in that one side, which is the outer side of each of the headersb Z), is provided with a continuous opening throughout the length of the header of sufficient size to permit of the proper handling of the tubes 61 cl in setting and expanding them in position, and this opening is covered by a plate I) fitted thereon, so as to securely close the opening, and is held in position by studs and nuts, said studs being set in the narrow flange formed around the edge of the opening. By this construction headers for sectional tubular boilers may be cheapened, as such have heretofore been made with openings opposite each tube, or a small number of tubes closed by means of a plate or screw-plug, which is quite a costly construction, besides which it provides better facilities for the manipulation and examination of the tubes, as all that are attached to one header are exposed by the removal of one plate. Another advantage of the openside box-header is that it is possible to apply the nipple or nipples used to connect the header to the other part of the boiler from the interior of the boxes, and thus save the expense of the hand-holes and covers now required'for this purpose.

The improvement in the drums adapted to be applied to the upper part of the boiler consists in making the drums h and h conical in form, arranging them in the same general direction as the tubes cl d, and connecting each of them to a front vertical box a and a rear vertical box a by means of suitablyformed saddle-pieces 2' and 2', having sockets which embrace the upper ends of the vertical boxes and flanges shaped to closely embrace the sides of the conical drums, the parts being secured together by rivets in the usual manner. The conical drums h and h are arranged with their axes in an inclined plane, their large ends being above the lower ends of the inclined tubes and their small ends above the upper ends of said tubes, thus more nearly filling up the space above the inclined tubes than is done when cylindrical drums are used applied to boilers of this class, and also bringing the greater volume of water contained in the large ends of the conical drums nearer to the fire. The angularity of the sides of the drum is preferably such that when the drums are arranged with their upper sides in a horizontal plane, which is the most desirable manner of arranging them, their lower sides will be substantially parallel to the inclined tubes, and as the smallest ends of the drums are located over the upper ends of the tubes (1 d the total height of a boiler of this class provided with these new drums will be considerably less than if cylindrical drums of equal capacity be used, thus particularly adapting tubular boilers provided with these conical drums for use in boats where headroom is generally restricted. Another advantage due to the use of these conical drumsis that while ample steam-space and Water-holding capacity are provided the steam from the tubes 61 (Z, entering the drums from the uptakes,which in this case are the vertical boxes a a, meets with but little resistance, as the water at these parts of the drums is of but little depth, while the flow of water to lower ends of inclined tubes through the downtakes,whichin this case are the vertical boxes a a, is facilitated by the greater depth and mass of water contained in the large ends of the drums.

The tubes jj connect the drums together at their adjacent sides, and to facilitate construction and repairs it is desirable to be able to pass these tubes into position from the interior of one of the drums, for which reason the drums will be so located in relation to each other that the diameters of their parts joined by the longest tube j will be about equal to the length of such longest tubes.

The front heads 7a and rear heads Z Z are attached to the bodies of the conical drums h and h in the usual manner, they being shown in the drawings so attached as to occupy vertical positions, and consequently are angularly arranged in relation to the axes of the drums. They may, if desired, be set on the bodies of the drums, so as to be square with or at right angles to the axes of the drums. Thefroutheadskkareprovidedwith the usual manholes and covers 7a 7a. They also have connected to them the steam-pipe m and feed-water pipe n, and by reason of their comparatively large size ample provisions are afforded for the attachment thereto of water-glasses, gage-cocks, c.

WVhile I have here shown and described my improved conical drum applied to the style of boiler described in my before-mentioned patent, it is evident that such improvement can be practically with advantage applied without material changes either singly, in pairs, or more than two to any tubular boiler having the tubes or main heating-surfaces arranged in inclined position.

I claim as my invention- 1. A tubular boiler, comprising tubes ar ranged in inclined position, an uptake in communication with the upper ends of the tubes, a downtake in communication with the lower ends of the tubes, and a conical drum located above the tubes and having its small end connected to the uptake and its large end connected to the downtake.

2. A tubular boiler, comprising tubes ar ranged in inclined position, an uptake in communication with the upper ends of the tubes, a downtake in communication with the lower ends of the tubes, and a conical drum located above the tubes with its upper side horizon" tally arranged and having its small end connected to the uptake and its large end connected to the downtake.

3. A tubular boiler comprising tubes arranged in inclined position, conical drums located side by side above the inclined tubes, connecting-tubes between the adjacent sides of the drums, uptakes by means of which the small ends of the drums are placed in communication with the upper ends of the inclined tubes, and downtakes by means of which the large ends of the drums are placed in communication with the lower ends of the inclined tubes.

4. A tubular boiler comprising tubes arranged in inclined position, conical drums located side by side above the inclined tubes, with their upper sides arranged in a horizontal plane, connecting-tubes between the adjacent sides of the drums, uptakes by means of which the small ends of the drums are placed in communication with the upper ends of the inclined tubes, and downtakes by means of which the large ends of the drums are placed in communication with the lower ends of the inclined tubes.

5. A tubular boiler comprising tubes arranged in inclined position, conical drums located side by side above the inclined tubes with their upper sides arranged in a horizontal plane, connecting-tubes between the adjacent sides of the drums, said sides of the drums being so spaced that the diameters of the parts of the drums connected together by the longest one of the connecting-tubes will permit of said connecting-tube being placed in position from the interior of one of the drums, uptakes by means of which the small ends of the drums are placed in communication with the upper ends of the inclined tubes, and downtakes by means of which the large ends of the drums are placed in communication with the lower ends of the inclined tubes.

6. The combination with a tubular boiler comprising vertical boxes or chambers, headers connected to the front vertical boxes and headers connected to the rear vertical boxes, tubes angularly arranged between and connecting the front and rear headers, of conical drums arranged in the same general direction with and located above the tubes, with their large ends over the lower ends of the tubes and placed in communication with the upper ends of the rear vertical boxes, and with their small ends placed in communication with the upper ends of the'front vertical boxes, and tubes connecting the drums together.

7. The combination with a tubular boiler comprising vertical boxes or chambers, horigular headers connected to the rear vertical boxes, tubes an gularly arranged between and connecting the front and rear headers, of conical drums arranged in the same general direction with and located above the tubes with their large ends over the lower ends of the zontal rectangular headers connected to the front vertical boxes and horizontal rectangu lar headers connected to the rear Vertical boxes, tubes angularl y arranged between and connecting the front and rear headers, two conical drums located above the inclined tubes, with their upper sides arranged in a horizontal plane, each drum being connected at its large end to one of the rear vertical together.

9. In a tubular boiler, in combination vertical boxes or chambers, headers consisting of elongated square boxes open at one side and plates secured thereto to cover said open sides, horizontally arranged between the front vertical boxes, nipples connecting the ends of the headers to the said front vertical boxes, horizontal rectangular headers similarly arranged between and connected to the rear vertical boxes, and tubes angularly arranged between and connecting the front and rear headers.

10. In a tubular boiler,in combination,vertical boxes or chambers, headers consisting of elongated square boxes open at one side and plates secured thereto to cover said open sides, horizontally arranged between and connected to the front vertical boxes, horizontal rectangular headers arranged between and connected to the rear vertical boxes, tubes ang'ularly arranged between and connecting the front and rear headers, two conical drums located above the inclined tubes with their upper sides arranged in a horizontal plane, each drum being connected at its large end to one of the rear vertical boxes and being connected at its small end to one of the front vertical boxes, and water and steam tubes connecting the two drums together.

Signed by me at Jersey City, New Jersey, this 21st day of February, 1898.

JOHN J. CAIN.

Witnesses:

F. H. SHEDLOOK, ALFRED SHEDLocK. 

